# A024849 (b-file synthesized from sequence entry)
2 2
3 4
4 6
5 9
6 14
7 23
8 36
9 59
10 94
11 153
12 246
13 399
14 644
15 1043
16 1686
17 2729
18 4414
19 7143
20 11556
21 18699